A 3-month-old infant presents with fussiness, poor feeding, and a tense, distended abdomen. The physical exam reveals multiple non-tender, bluish subcutaneous nodules, massive hepatomegaly causing respiratory compromise, and a small, non-palpable primary tumor suspected in the adrenal gland. A bone scan is negative for cortical bone involvement. This clinical presentation is most consistent with which stage of neuroblastoma?